<template>
   <div class="tab-control">
     <div class="tab-control-item" :class="{active:currentIndex === index}" 
        @click="itemClick(index)"
        v-for="(item,index) in titles" :key="index">
      <span>{{item}}</span>
     </div>
   </div>
</template>

<script>
export default {
  name:"TabControl",
  props:{
    titles:{
      type:Array,
      default(){
        return []
      }
    }
  },
   data () {
      return {
        currentIndex:0
      }
   },

   components: {},

   computed: {},

   methods: {
     itemClick:function(index){
        // 1.改变currentIndex
        this.currentIndex = index;

         // 2.发出事件
         this.$emit('tabClick',index)
     }
   }
}
</script>
<style  scoped>
 .tab-control {
    display: flex;
    text-align: center;
    line-height: 40px;
    font-size: 15px;
    background-color: #fff;
    z-index: 9;
  }

  .tab-control-item {
    flex: 1;
  }

  .tab-control-item span {
    padding: 5px;
  }

  .active {
    color: var(--color-high-text);
  }

  .active span {
    border-bottom: 2px solid var(--color-high-text);
  }
</style>